Is “I don’t have time to date” a valid reason to not date?

Any reason is a valid reason not to date. If someone chooses not to date, they don't have to defend it to anyone.

People have this funny way of making time for what’s really important to them.

Sometimes yes.

Most of the time it's not a priority.Hence we don't have time.

No. You have time for what’s important to you.

I don't think so.

I don't see how any reason someone has for not dating could be invalid