You're thinking about the wrong stage of friendmaking.

The pitch here is for getting people over the first hurdle, which is being at the same place at the same time as other people, and to some extent, the second hurdle, which is striking up a conversation (as anyone who would attend something like this is, by their presence, signalling an interest in at least casual interaction with the other participants). This adds people to your "acquaintances" list.

The next step is forming setting specific friendships. Your gym buddies, your work friends, etc. Then you need to actually invite some of those friends to other settings, until your friendship isn't entirely predicated on the particular setting. Then you need to spend enough time with that person to maintain the friendship.

For most people, the big hurdles are the "being present", "striking up a conversation", and "converting setting specific friendships into general friendships" steps. Everything else is pretty straightforward.

Casually dropping by someone's place unscheduled is typically reserved for pretty close friends. That's not what this service is targeting.

People are busy and can’t accommodate random pop-ins all the time. That is also a nightmare for certain personality types, and is often considered quite rude.

My dad is in his early 70s and still regularly gets together with people from all eras of his life, going all the way back to high school. Old neighbors, former co-workers and employees, and various others he met along the way. Unlike a lot of retirees, he has a rich social life and a packed calendar with dozens of close friends. This was all due to him regularly reaching out and scheduling a meal or activity, or just time to chat, over the course of his life. Friendships don’t just spontaneously last decades, they take effort, especially as people go through different stages of life.

There's a few furry events in my city which are basically "This pub, this day of the week every week". You don't bother working out who is going, how it fits in to everyones schedule. You just go if you feel like doing something that night and there will be people there.

I've got a few friends who I don't even have the contact details for, If I want to talk to them I just go out to whatever the current event or party is and they will probably be there.

I see the value of these services, but there's definitely an impersonal and formal nature to them, which takes away some of the humanity of just meeting people IRL and deciding to spend time. However, it feels like there are fewer third spaces people can spend time at without having to spend money where they can just randomly meet new people and see them regularly. Making new friends requires regularly being in the same space with them over time so you can build familiarity. Just meeting someone one time isn't enough for a lot of us to just decide "let's be friends and spend time together". If this service encourages people to hang out regularly, I think it's a step in the right direction.

While I generally agree with this sentiment - it's pretty hard to maintain friendships and relationships where both parties don't talk because they're both waiting to be spontaneous.

I don't "book/plan" things with friends, but it makes a massive difference to consistently reach out and nurture friendships.

The way you're describing meeting people seems fun, but half the time folks are busy with life or other stuff to be spontaneous.

I work from home, live far away from family, and sometimes the only social interaction I get each day is getting marketing text messages from HelloFresh. I then can take the time to go speak to my local barista for ~30 seconds and buy a drink.

Where I grew up, just showing up at someone's house unannounced was a faux pas. Scheduling in advance was the only way to do shit.