Why would a stand that they pay for be a weight around the clubs neck. I know it is a novel idea owners paying for something that they will own. If the owners are expecting the fans to pay for the new stand then in a way isn't the purchase of that stand a kind of leveraged purchase.
In short billionaire owners getting largely working class fans to pay for a stand that the billionaire owners will own.
Again, we aren't a charity, and the owners are not investing in us as one. The club pays for itself, be it for players, be it for a larger stadium, be it for an assistant for the tea lady.
Yes this may mean the club is worth a higher value and when they sell up the owners get more money, but the increased revenue the stand brings in stays and continues to come into the club (and hopefully spent on improving the team).
The only way any improvement in Anfield gets done is via it's income it brings in paying for it. No big £80m+ hand out given to us from the owners and converted to equity so the club has no debt.