The lump in the throat can be a GERD symptom, LPR symptom , or symptom of a motility problem. If you haven't gone to a GI , you DEFINEATELY should. Curiously a lot of people don't develop the lump until starting PPIS. I had the lump for a year, it is gone now and i am not on PPIS... haven't been in 2 years .... And i am perfectly fine

An ENT telling you that you will need a lifetime of PPIS is kind of radical , i would certainly get another ENT opinion as well.
There is much scepticism regarding an ENT LPR diagnosis
Many GIS do not beleive in LPR alone without GERD and think LPR is being overly diagnosed by ENTS . For one thing, there is disagreement as to whether you can diagnose by ENT examination because studies show that many normal people with no synptoms have the same physical characteristics ( red throat etc ) upon ENT examination. ( perhaps from enviremental factors, allergies, aging, smoking, etc) as those with LPR/ GERD.
Also there are not atequate studies done to accurately diagnose LPR on a ph test . We know you need more than 50 reflux episodes in a 24 hour period to be diagnosed with GERD , but there is controversy as to how many throat episodes you need in that upper probe to have LPR .
Two major studies recently published in the European Journal of Gastroenterology show that people diagnosed with LPR alone heal just as well on placebo pills than on PPIS . This leaves a lot of unanswered questions .