[2019] All members in a party should need to be level 30 before being able to attempt GM difficulty

Just now i was doing a contract on GM1 difficulty and i noticed that my team was dying A LOT more than usual. I tried my best to revive them every time they went down but they died again almost immideately afterwards. It took a good hour and 3 full squad respawns before we finally managed to beat the final objective and when we got to the reward screen i finally realized why this mission took so long and was so difficult: a level 23 and level 19 player were on my team which means they were in a party with their level 30 friend so they could play GM. Clearly their gear wasn't suited for GM since they kept dying over and over which resulted in the contract taking absolutely forever. A party shouldn't be able to matchmake into a GM game unless all party members are level 30 so things like this can be prevented. All these people are doing right now is wasting everyone's time.