There's no need. Canon has plenty of affordable options for amateur photographers to enter the system. Can you list a set of three FF zoom lenses spanning ~15mm to 400mm, in any OEM or 3rd party combination, that sells for less than the Canon 15-30/4.5-6.3 + 24-105/4-7.1 + 100-400/5.6-8? That trinity is currently $1550, but with various discounts over the past several months it could be had for $1350-1400.
You are sharing anecdotes about you and your cousin as paid photographers. I don't think Canon is aiming their high end lineup at 'up and coming' professional photographers, rather they seem to be increasingly targeting advanced amateurs for whom photography is a hobby, not a job. According to the US Bureau of Labor, the median salary for a photographer is around $40K/yr. The median salary for a dentist, for example, is around $165K...people in that income bracket with photography as a hobby are far more likely to be able to afford RF L-series lenses.