All that is speculation, which was based on two premises: 1) Hubble constant has value about 70(km/s)/Mpc; 2) with distance, we see "younger" (bluish) galaxies.

All that is speculation, which was based on two premises: 1) Hubble constant has value about 70(km/s)/Mpc; 2) with distance, we see "younger" (bluish) galaxies. (1) - wrong, Hubble "constant" has different values depending on frequency of light or radiowaves used for measurement. (2) - wrong, but papers about this started from 2008 only. In short, increasing diameter of telescope makes galaxies look "older".