It isn't for everyone... but we all have different obstacles. If it were easy for everyone, we wouldn't have so many 600 pound people. People say "just make small changes... do it gradually... ease in". That works for a lot of people... not for me. When I started losing weight, I absolutely needed to completely overhaul. It had to be all or nothing. I needed definite boundaries and the structure of monitoring macros gave them to me. It gave me opportunities to set small goals for myself as well as a structured way to let myself "cheat" and was the only thing that showed consistent progress. Using protein supplements gave me the amount of protein I needed for fewer calories which gave me a little bit of much needed wiggle room. Tons of people told me I was doing it wrong. Tons of people expected me to fail. Tons of people said it wouldn't last... and here I am... 6 years later, still going strong... flipping them all the bird.
People seem to forget that it isn't just a physical thing for a lot of people. Most people who carry a substantial amount of extra also carry a fair amount of mental and emotional baggage tied to those pounds. Losing weight, on paper, is far more simple than most people realize... but in practice is a completely different thing for an awful lot of people.
Anyway,
maybe she needs the trainer for motivation, maybe she needs the trainer to help hold her accountable, maybe she just needs him until she feels confident in the gym (that shit is HARD for women, especially when you're not just a cardio bunny. When you walk into the weight room someone may as well scream out "TITS ON DECK!!!". Not an easy thing to stomach for someone who's likely not comfortable in their own skin to begin with)... Whatever the case may be... she obviously feels the need to keep him around and stay on the plan she's on. She's getting the results she wants. I don't understand why everyone feels the need to tell her how she's doing it all wrong. You can't argue results. The woman just wanted to know if anyone had tips on buying cheaper chicken for chrissakes.