Map reveals strange cosmos.

In article , Nicolaas Vroom
writes:

An additional problem is gravitational lensing, that means the
bending of star light.

Of any light, not just star light.

The problem is that also CMB photons are bended. This works to our
disadvantage and makes a physical interpretation difficult.

Gravitational lensing has been taken into account in standard CMB
analysis for a long time now.

Note that almost all photons are CMB photons.
What do you mean ?

There is a certain number of photons in any volume of the universe at
any one time. If that volume is large enough to be representative, then
most of the photons originate in the CMB.

CMB photons originated shortly after the BB. Many are captured by intervening
stars which inturn also create photons at the same frequency.

Many but not most.