Which is quite small - 3 dioptres is 1.75 fold magnification, 5 dioptres is 2.25 fold. My first loup lamp had 8 dioptres (3 fold magnification) and an LED light source which unfortunately died within a few months.
And seriously: we want to do professional work. This requires good magnification and good light sources. We do not want to win the contest of being able to treat fine hair with simple visual equipment.
Moreover we are investing thousands of EURos or Dollars in high quality epilators and possibly a luxury treatment table and do even consider saving money on the visual equipment? Ain’t that inconsequent?