So here's the thing. Of all of those tables, some are going to be well thought out, well run campaigns. Those will not be boring. Some are not going to be well thought out, well run campaigns. Those might be boring(though that ignores that groups can have fun for reasons unrelated to the quality of the campaign itself)
And the above that I posted? That will be true regardless of what races are or are not allowed at a given table. If you were to change the settings on your magic so that you only popped into tables with no race or class restrictions whatsoever, you would have no greater or lesser chance of landing at a boring game.
A good DM that prefers restrictions can run a good campaign with restrictions. A good DM who doesn't prefer restrictions can run a good campaign without restrictions. A bad or inexperienced DM will be unlikely to run a good campaign, with or without restrictions.
It's a non-point from the perspective of whether a given game will be good or not.