MacLean's strike partner Stevie May has earned most of the plaudits this season after netting six goals in 11 games, but MacLean's hard work was rewarded with a goal on 42 minutes which cancelled out Kris Doolan's opener.
"I'm pleased for Stevie MacLean getting his goal," said Wright, whose side have now gone five matches without a victory.
"Stevie May quite rightly has been getting a lot of headlines but Stevie MacLean gives a huge contribution to the team and it's nice to see him getting a goal."
Wright also revealed that Steven Anderson faces a spell on the sidelines after he injured his thumb when he slipped in the sixth minute, allowing Doolan in to round Alan Mannus and finish from an improbable angle.
Anderson immediately left the pitch with his thumb pointing the wrong way, and Wright added: "It was a poor goal we gave away. Unfortunately, Steven
slipped and gifted it to Thistle.
"He had to come off injured. We were hoping it was only a dislocation but we have word from the hospital and he has got to go to a hospital in Dundee for an operation and that would suggest it is more than a dislocated thumb, maybe a break."
Dave Mackay blew a late chance to win it for the hosts when he tamely shot straight at Paul Gallacher, and Wright said: "We are frustrated not to come away with all three points.
"We should have created more chances with the possession that we had. That's down to some excellent goalkeeping from Paul Gallacher."
The former Scotland keeper was making his debut for Thistle after Scott Fox was ruled out with a foot injury, and manager Alan Archibald said: "Paul did very well, that's why we brought him to the club, so he can compete for the number one spot.
"Scott got injured on Friday and was only about 60 per cent fit. We thought he had broken his metatarsal but we sent him for an x-ray and it's severe bruising on his foot.
"My honest opinion is that a draw was a fair result. We had chances to win the game, but so did St Johnstone.
"We were the better side in the first 30 minutes and if we had scored a second it would have been a different story.
"I thought there was a foul in the build up to their goal and that the referee was about to give it. Kallum Higganbotham goes for the ball and the boy Paddy Cregg put his foot up. Usually that's a foul. But a goal always seems to come from these things."