I am friends with a third grade teacher (children aged about 8) who has seen in her classroom for the last few years the results of far too much reliance on technology by parents - children who can't use scissors, children whose drawing skills are at the level of 5 year olds, children who do not interact well with each other, and many more children who are overweight than she ever saw before in a 20-years-and-counting teaching career.
OP, I think you are absolutely right that there is no place for electronic devices in the case of babies and toddlers. They need sensory play and they need to develop a connection with caregivers and to learn to function in whatever group they belong to - family, nursery, whatever.. They miss out on vital developmental tasks (socio-emotional, as well as physical) if they spend time zoned out in front of a screen, and they will never make up for that developmental loss. 'Online educational tools for toddlers' is a contradiction in terms. There is nothing better for toddlers than meaningful engagement with a caregiver in whatever real life, stimulating physical environment the parents can provide - home, nursery, CM, etc.
Once school age approaches however, they will need some exposure to tech, because schools tend to use tech in the classroom and children play games and absorb entertainment online. For social development with peers, it is a good idea to have some exposure to popular children's TV and movies. There is a happy medium, and it's important to control what your child is exposed to and for how long.
Be consistent - you can keep your child as tech free as you like within reason. As with candy and Coca Cola, you can say no and keep on saying no in the face of stropping.
Don't disparage children or parents who use a lot of tech as a means of keeping your child off it - make sure your child knows this is a positive choice for you, chosen because you love everything else, not something you do to fill a hole in your personality or to bolster a sense of superiority or to indulge a need for an axe to grind.