Sure, I agree with all of those things, but the fact still stands, Steam is actively lying to customers as the store pages say "Buy" and "Purchase", not "Rent" or "Lease", which are more accurate. You don't actually own the product.
Don't get me wrong, as mentioned, I use Steam and like Steam/Valve, but that move is a bit shitty regardless.
I think it would be extremely confusing for customers if the steam “Buy” button was renamed to “Rent” or “Lease”.
When I check out on Steam it displays this text to me:
> A purchase of a digital product grants a license for the product on Steam.