stupid question, wouldn't it be easier to just have sub addresses?

like my fictional ip address is 123.123.123

and I can set my router to give up to 1000 sub addresses, so one computer can host a Minecraft server at 123.123.123.001 I have another for my some projects, the projects ones each have sub addresses like 123.123.123.002.001 and 123.123 123.002.002...

a company could have countless layers and any amount of addresss they want.

and we're never going to run out of addresses.