Everybody should experience this quite frequently. Even missing that 75% chance four times in a row is not any higher than a 1 in 256 chance, hugely far from winning the lottery.
The trouble is, it keeps happening; i.e. much more often than 1:256. I wouldn't like to commit to a figure, but it happens way too often; certainly more so than landing a critical hit, for instance.
The other thing is it seems rather redundant as even if you do pass the chance-to-hit, it then rolls again to see if the target is realistically damaged or just a glancing blow.
Of course it may simply be communicated to the player rather poorly: if perhaps it's "you have a 75% chance all things being equal, but now I'll factor things like respective skills, strengths and other stuff that's going on into the equation" which would render that number rather meaningless.
