They dont need to, there are so many adaptors and legacy lenses that the sensor can extract more detail from.
Im not anti mft, if you buy the expensive lenses the results are god at moderate print sizes through iso 1600. They are not good for fast wide shots, and pound for pound for beginners, the nex’s with pdaf vs mft both with kit lenses, the nex’s clobber them in iq at anything over base iso.
Sony has a lot of problems too that mft has solved, mft has better native primes for now and the highe nd bodies handke off camera flash better.
Both systems are imperfect. For someone shooting kids running around yah, mft is probably better at tracking, for a limited about of time. For alt glass users the nex is better.
For those looking to shoot natural light, nex fuji
Those wanting strobe mft
Full frame is getting affordable now sub $2k for a ff kit, you really have to want a small cam to go with either, which i like many do. Im frustrated by fuji raw, mft sensor, nex flash
Started out doing photography at the age of 6 using an uncle's old 1940 kodak brownie box camera. At 15 years of age, I decided to buy my very own 1975 Praktica SLR camera. I now shoot with a Nikon D850. I do unpaid TFP and commercial paid work.