You absolutely can lose weight and gain muscle at the same time. It's the whole basis of body transformation diets.
Is it less efficient at building muscle than a bulking diet? Sure. But you absolutely can.
Is it less efficient at building muscle than a bulking diet? Sure. But you absolutely can.
It's telling a beginner that it's possible to do an expert level skill, without the beginner understanding that it's an expert level skill. It's yet another diet that will fail for that beginner.
It's not that difficult for a newbie to do, there's a reason it's called noob gains, usually the first year of weightlifting you can see insane increases in muscle mass that you just won't see on someone who is better trained and closer to their genetic maximum.
Jeff Nippard recently did a year long program with his untrained, overweight brother and put it all up on youtube.