Perfect forms of verbs are redundant: Simple past tense doesn't have an auxiliary verb anyway so you can already differentiate it from perfect or passive cases when you use it with have or be respectively.
Easier to learn one variation of each verb than two
PRO-PERFECT FORM:
Redundancy in language is good, losing one part of a sentence due to noise, signal loss or damage to medium may be saved by a redundant part making communication more reliable.
but also:
regular verbs already have identical simple and perfect forms
which kind of tips the scales I think. perfect forms are already inconsistent, and verbs with identical forms already prove there's no significant loss in not having a distinct perfect form. I was gonna add "can be used alone and carry its own meaning (eg drunk)" as a bullet point in favor of perfect forms but regular verbs with no distinct perfect form can also be used alone and still carry the meaning (eg beloved)
so yeah I think distinct perfect forms are on their way out, long term.