Professional photography is term used with little respect for its roots. For well over a century professional photography was only found with those who had invested into costly equipment and finishing techniques that were uncommon to the general population. The cost and time to produce film and print was beyond the abilities of those without a professional studio.
The DIGITAL ERA entered the arena of photography and everyone became a "Professional Photographer" with equipment as simple as a cellular phone camera.Yes, you can see tremendous images from something as simple as a cell phone. For texting and online social media, those images will appear just fine unless you are looking for fine details.
My photography is all about the details and the format it requires for printable matter to call oneself Professional. That is a defining difference between the "Professional Photographer" and a person that clicks their cell phone or cropped sensor cheapo camera.