That explanation does not wash. Contrails form when hot jet engine exhaust freezes the water vapor into ice crystals. This appears as a thin vaporous line that normally quickly vanishes, although they can spread thinly and cause a day to be cloudy or overcast that would otherwise have been clear-sky. The presence of contrails is an indication of high moisture in the upper region of the troposphere. Part of a contrail freezes, while the other part descends (like mammatus or virga) and evaporates. The frozen remnant of the contrail may have the appearance of a thin line, or vortex. Usually the contrail will transform into cirrus or cirrocumulus, or dissipate before a transition occurs.
Chemtrails look like contrails initially, but are much thicker, extend across the sky and are often laid down in varying patterns of Xs, tick-tack-toe grids, cross-hatched and parallel lines. Instead of quickly dissipating, chemtrails expand and drip feathers and mare's tails. In 30 minutes or less, they open into wispy formations which join together, forming a thin white veil or a “fake cirrus-type cloud” that persists for hours.
In order to see, one must first remove their blinders.