Hart, who is on loan from Manchester City, was replaced by Adrian for West Ham's defeat by the Premier League leaders this month and the Spaniard's performance earned him a starting role in the shock 1-0 win over champions Chelsea.
A prolonged spell on the bench could jeopardise Hart's chances of being England's first choice goalkeeper in Russian Federation in the summer, even though earlier this month Gareth Southgate said he remained England's starting goalkeeper.
"The problem they have now, although it's not a problem as such, is that they have set such a high standard today and I think 'how can you be in this position when you can play like that?", Redknapp wondered. "That's why it wasn't an easy decision".
'I wanted to do it from my first day when I started at West Ham but it was a hard time.
'With the signing of Morata they've added pace in attack, while (Eden) Hazard is very good between the lines'.
Barcelona coach Ernesto Valverde: Strong Chelsea a hard draw
Paris Saint-Germain (PSG) boss Unai Emery is upbeat over his side's chances of getting past Real Madrid and advancing to the Champions League quarter-finals.
'I don't want this to be my last goal, I want to make the club's fans happy'. It's a manager's job.
Speaking to TalkSPORT, Pearce said: "He [Hart] is disappointed that he hasn't been playing".
However, Moyes hinted Hart could find himself back into the starting XI, given West Ham are still competing on three fronts.
West Ham had a big win on the weekend as they beat Chelsea to get their season back on track. "He (Hart) will play a lot of games this season, I've got no doubt about that".
"When the opportunity comes around again, he has to be ready for it, clean sheets, no mistakes". So he's such an important player for us.