Heaviside thought that too which is why he invented the modern form. Not that he just used a different set of math to describe the problem, he invented the math too.
You're really caught up on this commoner/non-commoner dynamic (from your other comments). Was it really that important? - many of the well known scientists of that time were 'commoners'.
I just read his Wikipedia and he was sponsored by his uncle Sir Charles Wheatstone of Wheatstone bridge fame and ended up a Fellow of the Royal Society so was not so badly situated.
By the way looking at Maxwell's paper it seems awful complicated https://royalsocietypublishing.org/doi/pdf/10.1098/rstl.1865...
compared to the modern form of the equations https://ethw.org/w/images/d/d6/Maxwell_image_02.jpg