I avoid tables, except for some free space pages. Partly because they often display badly on mobile phones and tablets - and a lot of us use tablets frequently for working on WT and a lot of visitors will be using tablets. Partly because they can be fiddly for others to edit, and may cause particular difficulty for people who are not experienced in editing tables. Partly because for most information, many people find it easier to digest it in text form rather than as a table. It is, I believe, a good WT principle to keep things simple, and this facilitates collaboration. As the help page on editing tips says, ”Plain text is almost always best."
For things like lists of children, or lists of positions held, tables make things unnecessarily complicated. The information is harder to read. Even more so if there are some blank cells. It becomes much more cumbersome to add or remove children or posts held if good sourcing is found for this, as happens often with pre-1700 profiles: and with a bulleted list, it is much easier to add helpful information that would not fit easily into the rigidity of a table format (eg to indicate where sources disagree on whether someone was a child).
For the Medieval Project and Magna Carta Project, which I co-lead, I invariably remove any table I find if I am overhauling a profile, and replace it with text, using bulleted lists where appropriate.
