BUIS on a red dot pistol is sort of like the fire extinguisher on an aircraft. There is nothing good about needing BUIS on your red dot pistol, or the fire extinguisher on your aircraft. However, with both the extinguisher and BUIS, if you need them, you will be really happy you have them available.
My number one competition pistol is a Gen 4 Glock 17, direct milled for a SRO, with Ameriglo tritium BUIS. I verified zero after installing the BUIS, but have not fired a shot since using them.