Yes, it did. A woman who was sidelined into a 'female' job on low pay with little or no pension wasn't going to be able to make it to the top (or anywhere near it) in time to make a difference. Even when the law changed, culture often didn't, and infrastructure (such as childcare and the idea of 'real men' and 'good husbands' supporting stay at home wives) was slow too. Many women worked for 'pin money' and didn't pay NI, sometimes because employers preferred to keep everyone under the limit so they didn't have to contribute either, and sometimes because the pay was low and there was little or no childcare available for those without family help.
Also laws that forced employers to allow part-time workers and those on recurring contracts (eg term-time in schools, or renewable academic contracts) to join pension schemes came in much later, and most PT workers have always been female. Some entry level jobs were renamed to make them sound unisex, but in fact were reserved for one sex or the other, with the higher paid ones with prospects for boys, and the support ones for girls.
Many women paid a lower stamp (NI contribution) when they married, as it was assumed their husbands would provide when they retired, and he could make higher contributions to his own SERPs (the earnings related bit of the old state pension), which could have tax advantages for the couple. Fine if that happened as planned, but if the couple split, it was the woman left with a low pension, and when the SPA changed these women had far more to pay back than if they had paid the full amount in their own right. I'm not advocating that those who paid in less should get a full pension, but it's not as clear cut as it sounds.