I'd say the outright dismissal of equipment changes is a miss there. There were changes still being finalized until late in the 18-19 season, but it takes time for teams to figure out how the changes impacted goals. Right now we see a lot more goals scored in that armpit area. That is a direct result of two changes in equipment. The chest protector was shrunk and trimmed... and the jersey was required to be tighter. That has allowed goals to start squeaking through. Once teams figured this out, it that spot started being targeted more. Two other major areas impacted are the glove and the shoulders. The glove got shrunk by a little bit, but that little bit has made goalies with weaker glove hands more susceptible to just missing and leaving rebounds... or just missing the puck. The shoulders are impacted on the tight angle shots where shooters are targeting the corners when goalies go down. There used to be an extra bit of padding there. That used to be a very tight window to shoot into... maybe 4x4, but now its closer to 6x8. Doesn't sound like a lot, but with the shooters of today, that a huge difference and gives them a much better chance of success.
TLDR it takes time for equipment changes to change how teams attack. It isn't an on-off switch.
These are directly because of equipment changes. They were not developed or brought up with the technique to account for modern equipment. Goalies developing today will have different technique to counteract the equipment changes.