That's an odd comment to me. Different TLDs have different pricing, different restrictions, and so on. Giving the topic some thought isn't stupid. And .com is a pretty crowded namespace.
.com is the cheapest
>different restrictions
.com has the fewest
Anything else?
It isn't, either for initial purchase or renewal, and that's pretty easy to verify.
>>different restrictions - .com has the fewest
How so?
Popular domain hack ccTLD .ly is required to adhere to Libyan and Islamic/Sharia Law [2]
(edit because my posting is rate limited: )
There are plenty of non-ccTLDs, though, including thousands of gTLDs.
You can register a .horse domain if you want, and as far as I know, there are no restrictions on use.
You just need to research what you're buying.
[1] https://en.wikipedia.org/wiki/Country_code_top-level_domain