Yes, learn to use flash, this takes a lot of practice, but when you start to get used to it, you’ll wish you could use it almost all the time. BUT, many events wont allow it, so this usually isn’t an option, and sometimes people will be snarky because the flash is interrupting said performance/event. They are distracting to patrons.
A big point though, bad flash photography is a thing, and unless you do know what you’re doing, DO NOT USE IT. You don’t want to be known as the person that takes bad flash photos that interrupts and annoys people. Having proper flashes/diffusers and knowing your settings and really knowing it is the only time you should use it.