Probably because it's highly doubtful teams such as Bournemouth will get fines anywhere near as expensive for the same thing.
The bold part clearly shows I agree regarding the value of the fine.
Firstly whether you call it meaningless or not misses the point which is that's my money !
By meaningless I mean
Loads of other invasions are ignored, indeed lauded.
It was celebratory not violent.
The fine will have absolutely no impact on future games, how the crowds behave, or anything else, it isn't a deterrent (can't deter it anyway), it isn't a punishment of those who ran on, it isn't preventative.
Meaningless.
I'm pretty sure you've missed my point. I already said I thought it was steep due to previous fines (Small Heath being fined £20,000 + a suspended £20,000 for an invasion against us came to mind) but the idea of a fine for breaking a rule surely can't be meaningless.
If you break a rule you should be punished, that is the meaning of the fine.
EDIT: The fine may not be a deterrent to the fans but it should be for the club who you would hope would improve the level of stewarding for future games that are bound to have issues surrounding them.