Even if the tax code didn’t change at all and we still filed our taxes the same way I would support this. A couple of years ago I had to mail my taxes in. It took them over a year for them to process them. During that time the government owed me over $5000 which may no seem like a lot but I was a poor student. (They sent me a check for a whole $50 in interest.)
There are apparently millions of other tax returns in the backlog. Those returns often represent people like me whose money was locked up. I was fortunate that it didn’t cause me true financial hardship but I’m sure others weren’t so lucky.