I know we all have our favorite ways of doing something, but from all I've read so far in this and the other thread, it seems opening your photo in PSE and adding text using a text box (for most versatility) can be a compromise you could live with. Once you incorporate it into your workflow, you may not find it as inconvenient as you might think. (Remember - use copy/paste to save even more time)
If more flexibility in adding captions is needed, the general consensus among the PSE experts (such as Barbara Brundage) is to use the Type tool to create your captions. As Janice pointed out, you can lend a helping hand to your workflow by using Copy/Paste/Text box. Another possibility is to use Paragraph Text.
Elements 7, 10, 11, 12, 13, 14, 15, 2018, 2019 Photoshop CC 2019 & Lightroom Classic Windows 10 Pro