I agree with OP, thrusts are harder to block IRL. This should be obvious, but for those without melee experience and/or lack of imagination: seeing a point coming towards you is harder than seeing a line.
The argument about a thrust leaving you more open is nonsense. The fact is true, but this only applies AFTER the block, and it's actually already in the game (blocked thrusts delay you longer than blocked sideswings).