The reason researchers publish in these journals is it gives them street cred. There are several open access journals - but scanty participation since their impact factor is unknown and does little to promote the researchers career.
Speaking as someone who has published myself, the paywalls are highway robbery. But, imho - it is a problem only the researchers can solve by concertedly supporting open access journals and getting involved in them (maybe a yc research idea???). The established professors would need to take the lead on this - not the underlings.
Personally - I've seen the "light" and stayed back in industry as opposed to moving into academia as I had hoped. The rat race for funding & publications & street cred seemed a lot worse there.