There is a false narrative that is always presented about lightning that it is intended to be the only solution to scaling which is false.

Bitcoin must scale in many ways -

1) Onchain with efficiency improvements like MAST and Schnorr sig aggregation

2) Lightning and other payment channels

3) Eltoo

4) statechains

5) sidechains like liquid / bakkt

6) and yes a future HF to increase the blocksize beyond the current 4MB of weight