Because most of us managed to do all we needed to do without the use of a computer. We had typewriters and if we wanted more than one copy we used carbon paper. If we made a mistake we used a typewriter rubber (and later on it was Tippex or a wonderful invention called a correction tape) Sometimes the boss would notice an error as he was about the sign the letter and would just amend it with his pen but if we made a terrible mess of it we started again !!
We had phone boxes and house phones and, more recently, mobiles so are not interested in Skype.
We watched all that we thought we needed to know about other parts of the world on the T.V. news (prior to that on the radio) and what we did not know about we did not fret about. We didn't feel the need to have a moment by moment commentary on something happening in a country of which we knew virtually nothing.
We walked or took a bus to the railway station to buy or book a ticket for our next rail journey. Some of us could do that by telephone and send the money in the post, we did not rely on paying via the internet because it wasn't there and nor were direct debits and credit cards.
We lived a simpler, more care free life, innocent of what was happening in many parts of the world but we got on and did what we had to do each day and we did it thoroughly and well and were pleased with our efforts.
Prior to the internet we actually had conversations with our neighbours and we walked to shops and chose our goods and carried them home, possibly on a bus where we talked to yet more people. Now, many don't even know their neighbour because we are all on our computer. No-one says hello at the garden gate anymore because we are all driving out in our cars. Supermarkets take orders over the internet and they arrive on our doorstep by van - no interaction with anyone except the person who delivers the goods.
This is what is commonly known as progress! I wonder?