Being incel is a result of a combination of stats.

Think of it as a character RPG sheet.

You have 4 stats, and you can have between a 1-100 on each stat.

Face (looks)
Status (Money)
Height
Mental (Charisma, confidence, humor, sanity)

In general, if you have 150 points you can probably get laid.

If you have 100 in status 25 in height and 25 in face; you can get laid.

If you have 50 in face, 50 in height, 50 in status; you can get laid.

However, if you are an ugly, short, middleclass guy; tough luck.

An incel is an ugly, short, low status and unattractive guy.

You could be 7 feet tall, but if you're an autist with a shitty face and no money; good luck.