I mean Bulma doesn't turn humans into cyborgs because while she's probably capable of learning the method, it probably requires a high degree of human experimentation that will likely result in a lot of failures (read: innocents dying) before it has anything even resembling success
Lmfao. Now here you're just talking shit. Frieza didn't get any more reason to get stronger than 17. 17 was proud of his power and got completely humiliated, that's enough reason. On top of that, he started off far stronger than the regular super saiyans and Frieza, and had 10 years to train and get stronger, Frieza had FOUR MONTHS.
Part of enjoying Dragon Ball is accepting the nonsense. In Dragon Ball you have characters making huge leaps with powerups and a few months of training, or less. Like Goku going from Saiyan saga power levels to the second strongest guy in the universe over the course of six days. Vegeta going from Zarbon level to matching Frieza's early forms after a couple zenkais. All the instant powerups from people like Guru and Elder Kai. Dr. Gero making beings capable of being stronger than super saiyans in an underground lab on Earth. Trunks getting all those huge boosts in the Zamasu arc.It's part of the series. Has been since Dragon Ball where everyone would show up at a tournament and be immensely stronger than before and just mention one or two lines about training.
I'd argue that 17 has more of an argument to get stronger than Freeza does, actually. For one thing, Freeza admits to having not trained a day in his life before the 4 months. He was just born with an immensely high power level and transformations in addition to being a prodigy. 17 came out of the oven stronger, with the potential to improve, and has unlimited energy whereas Freeza's maximum power transformations drain him.
tl;dr: 17 started from a higher level than Freeza, has unlimited stamina, and much longer to train. Him being at Blue level i'd say makes more sense than Freeza, not less.
I mean there are far better shonen to follow if you want a consistent narrative and compelling stories and world building. For me abandoning the power level bullshit that was dragging the series down is a good thing. Doing so allows you to capitalize more on the actual strengths of the series