The only possible reason I may hesitate on a drinks break - especially 2nd half - is if it somehow gives one team a tactical advantage ... a team that is losing but building momentum would perhaps not want one - whereas the other team under a bit of pressure would be looking for one ... would just need to make sure the planned drinks breaks were fully communicated & agreed pre-game
This is a good point and is why I believe we should have some guidance on drinks breaks. I can envisage a match tied at 1~1 and the stronger fitter team being aggrieved if you stop for a drinks break which would perhaps be an advantage to their tiring opponents. Could I suggest that drinks breaks are only allowed at the mid point in each half and should not exceed a few minutes?