Not true. As your hair grows it becomes subject to environmental damage (wind, sunlight, washing and combing or scratching). The result of this is that the tips of the hairs become tapered over time. If the tip of the hair frays you get a “split end”.
When you shave hairs and feel the stubble coming back, these hairs have not suffered environmental damage and feel quite “thick”.
They are just normal hairs without damage.