Next time when you are on a couple of mile final pull the power and see what happens! - you may not reckon the lights to be quite so enticing next time.
There has been debate before on PPrune about whether (or not) you should fly the approach on the basis if you lost the engine you would make the threshold - I seem to remember their were views both ways. What ever, the chances are on most types if you fly the PAPIs you certainly wont, but where is the glide slope for your type?? At least this way you will have a pretty good idea if the worst should happen whether you will be in the car park or on the runway. It will also be of help in due course with your PFL training.
In due course as others have said ask the tower to turn off the PAPIs or ask your instructor to take you for a few circuits at an airfield without PAPIs (most dont have them), although to be fair to your instructor often airports authorised for training are the ones with PAPIs.
Where do you fly from?