She was also a feminist, and I have always remembered her saying she had no time for men who were only interested in their own surname and male line . . .
That's rather harsh and probably deserves a reverse comment that nobody should have any time for her or anyone else with a similar attitude.

For most researchers, genealogy is a hobby and one should be able to take part in whatever way the mood takes you.
Anyone who starts researching their family tree will naturally start with their own surname which, by convention, means following the male line. Even widening the search to include the female line can get stuck in a similar rut, just because the surname is known, most of the time, and hence makes it easier to know who to look for. In contrast, looking back at the purely female line involves a change of surname with each generation.

That is one distinction that does not occur when tracing horse pedigrees. (My wife has Arabian horses!)
However, there is one immediate advantage in looking for female ancestors. They were probably married from home or very close to it and hence the area of search can be much reduced. With male searches, one might know who to look for but not necessarily where.
Hence, I feel that most people still concentrating on their male line only are probably less experienced and in need of a little encouragement to see the wider picture, whether they be male or female themselves.
One Name Studies are an exception where the researcher has recognised that there is just not enough time available to look into the finer detail of all lines. My own preference would probably be to conduct a Multi Name Study, where I choose who to include and who to exclude on a completely arbitrary basis.
