Is it true records are sealed to look better....

...and need a thorough proper cleaning even when new to sound best?

A vendor of ultrasonic record cleaning machines asserted this to me recently.  He also described a 45 minute process using an ultrasonic record cleaner to address it. Yikes! I clean my records manually now in just a few minutes and sounds clean when done. I thought an automatic record cleaner would save time and make things easier but not according to this particular expert.