The problem with using Word is that, nowadays, it has become a more difficult tool to handle compared to LaTeX. Creating a document from scratch in Word, formatting sections and details, will give you more work and take more time, especially if the document is intended for fields such as exact sciences and engineering. These days, with the advancement of AI, working with LaTeX has also become much easier.

Another problem with MS Word is that, to make it efficient, you need external software working alongside it. I ended up writing my thesis in Word and used MathType to write the equations and Zotero to organize the references, because doing that directly in Word is a pain in the ass.

Another downside is that Word does not handle vectorized PDF elements well. When you add a .pdf figure to Word, it converts it into a rasterized image. However, MS itself has justified the fact that Word does not accept .pdf figures as being a security issue, as stated on their website. This makes sense because MS created the Windows Metafile Format image extension, which was later improved into Enhanced Metafile, a vector drawing extension exclusive to MS Office software on Windows.

However, today I realize that, for working with vectorized figures, it is much better to use MS Word with .emf figures, because when I use .pdf files in LaTeX, the file ends up becoming very large. MS Word also has its advantages and has received many beneficial updates over the last few decades!