Almost all of the autonomy and authority of chairpersons has been stripped away in favor of giving members more say in day to day operations at the committee level. More people (who are usually less qualified) having a say doesn’t make things better. It makes things slower, harder, and worse. It’s stupid now and it was stupid when it was implemented.
Give highly qualified and highly motivated people autonomy and enable them fully. Give every chairperson a credit card (and make credit checks mandatory). Cut the red tape and stop voting on trivial things. If they fuck up then replace them. If they do a good job then do everything you can to keep them. The ungrateful and clueless will always be there and always have been but I don’t think that’s why many people have largely stopped trying to volunteer.