Depends on the person

No, ppl have social anxiety and other things that prevent them from making friends so easy.. y’all need to give people a break

depends on the reason

Yes

Well, it depends on what the reason might be. For example, they might choose not to have friends if they are focused on setting healthy boundaries, or they might not have friends because their friends moved away.

Should I eat a half eaten hamburger that I found at the bottom of a dumpster?

Eh, I think in the past it was seen as one but now a days, people are starting to appreciate solitude more than anything.

No cuz everyone is fake

No it's a red flag if they have many friends or more than one. You only get one good friend some are lucky and blessed to have more but it's rare.

it can be!