This 100%. Just to give another viewpoint on this, having just started going full time on my solo agency, I actually love doing the sales and marketing stuff and scoping the work for clients. Yes, it does take a lot of time away from pure technical work but I do enjoy the balance of it. So, it does depend on your own interests and how you like to spend your time. Freelancing/Consulting is definitely not for everyone. And tbh, lets see maybe in a year or two I will be fed up of the sales/marketing stuff too.

One thing I will say though is that, it also comes with a lot of flexibility and freedom and you set our own hours and location which in itself is very valuable. Of course has its own pros and cons and you have to be quite disciplined to begin with.